·         C# 4.0 has released recently in 2010 and all these features could work with visual studio 2010 because VS2010 can be targeted to .net framework 4.0 version. C# 4.0 mainly focused on dynamic programming and contains following features.

·         Dynamic Binding

·         Name and optional Arguments

·         Improvements in CoVarience and ContraVarience

·         COM specific interop features